The SI units and their conversion factors are listed in Table 1.3. Two units outside of but recognized by SI (liter and bar) are commonly used in interna¬tional fire protection. Metric units of measurement in this standard are in accordance with the modernized metric system known as the International System of Units (SI). In such cases, the designer is responsible for demonstrating the validity of the approach.ġ.3 Units. It is intended that a designer capable of applying a more complete and rigorous analysis to special or unusual problems shall have latitude in the development of such designs. The standard does not do away with the need for the engineer or for competent engineering judgment.
Therefore, the designer is cautioned that the standard is not a design handbook. The user of this standard must recognize the complexity of clean agent fire extinguishing systems. Technology in this area is under constant development, and this will be reflected in revi¬sions to this standard. Nothing in this stand¬ard is intended to restrict new technologies or alternative arrangements provided the level of safety prescribed by this standard is not lowered.ġ.2.2 No standard can be promulgated that will provide all the necessary criteria for the implementation of a total flooding clean agent fire extinguishing system.
This standard is prepared for the use by and guidance of those charged with purchasing, designing, installing, testing, inspecting, approving, listing, operating, and maintaining engineered or pre-engineered clean agent extinguishing systems, so that such equipment will function as intended throughout its life. It does not cover fire extinguishing systems that use carbon dioxide or water as the primary extinguishing media, which are addressed by other NFPA documents.ġ.2.1 The agents in this standard were introduced in response to international restrictions on the production of certain halon fire extinguishing agents under the Montreal Protocol signed September 16, 1987, as amended. This standard contains minimum requirements for total flooding and local application clean agent fire extinguish¬ing systems. Retrieved 15 April 2015.NFPA 2001 Standard on Clean Agent Fire Extinguishing Systemsġ.1 Scope. 'Cornwall speedboat accident: police pay tribute to rescuers'.
#Dead man type abort switch manuals#
^ 'Locomotive Repair Books, Record Cards, Manuals and Driver's Handbooks'.^ 'Code of Federal Regulations, Title 16, Part 1205 - Safety Standard for Walk-Behind Power Lawn Mowers'.'Not the First Time the 'Dead-Man' Switch Did Its Job'. 'WikiLeaks 'dead man's switch'? Assange's arrest prompts speculation about possible major data dumps'. 'Alerter system' (in higher-order systems in which the switch activates to sound an alarm rather than deactivates to disable the higher-order system).'Driver's Safety Device' ('DSD') (the official term in the UK for switches of this type as used on railway trains).
Replacement of 'dead man's' or 'dead-man' with 'enabling' or 'live-man' (commonly used in the robotics industry).Replacement of 'switch' with 'control' or name denoting a specific type of switch, e.g., 'button', 'trigger', 'throttle', 'pedal', 'handle', or 'brake'.Some airplanes use vigilance control to minimize hypoxia descending to lower altitude if the pilot is unresponsive. This has been the cause of accidents, some of which were fatal, and/or that have caused limb loss. It is a common and dangerous practice to defeat the kill cord by fixing it to part of the boat instead of the operator for convenience. This prevents the boat from continuing under power but out of control, risking injury to anyone in or out of the water including passengers who may have fallen out or may still be in the boat, and collision damage to any property in the path of this out of control boat. If the helmsman goes overboard or is forced away from the controls, the engine cuts out. On powered boats in particular this cord often called a 'kill cord' (use around the wrist is not recommended). Should the rider fall off the vehicle or the operator at least move away from the controls, the cord will be pulled out of the dead man's switch, turning off the engine or setting the throttle position to 'idle'.
On recreational vehicles such as boats, personal water craft and snowmobiles, and on the control panel of many amusement rides, the user or operator has a cord or lanyard attached to their wrist or life jacket that is in turn attached to a key mounted on the dead man's switch.
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